From 344c837686b4268882ee4942f2a1e5e5716c7383 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 30 Aug 2015 16:55:20 -0600 Subject: rockchip: Bring in RK3288 device tree file includes and bindings Bring in required device tree files from Linux. Since mainline Linux is somewhat behind, use the files from the Chromium tree. We can re-sync once further code is acccepted upstream. Signed-off-by: Simon Glass --- .../thermal/rockchip-thermal.txt | 68 ++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 doc/device-tree-bindings/thermal/rockchip-thermal.txt (limited to 'doc/device-tree-bindings/thermal') diff --git a/doc/device-tree-bindings/thermal/rockchip-thermal.txt b/doc/device-tree-bindings/thermal/rockchip-thermal.txt new file mode 100644 index 0000000..ef802de --- /dev/null +++ b/doc/device-tree-bindings/thermal/rockchip-thermal.txt @@ -0,0 +1,68 @@ +* Temperature Sensor ADC (TSADC) on rockchip SoCs + +Required properties: +- compatible : "rockchip,rk3288-tsadc" +- reg : physical base address of the controller and length of memory mapped + region. +- interrupts : The interrupt number to the cpu. The interrupt specifier format + depends on the interrupt controller. +- clocks : Must contain an entry for each entry in clock-names. +- clock-names : Shall be "tsadc" for the converter-clock, and "apb_pclk" for + the peripheral clock. +- resets : Must contain an entry for each entry in reset-names. + See ../reset/reset.txt for details. +- reset-names : Must include the name "tsadc-apb". +- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. +- rockchip,hw-tshut-temp : The hardware-controlled shutdown temperature value. +- rockchip,hw-tshut-mode : The hardware-controlled shutdown mode 0:CRU 1:GPIO. +- rockchip,hw-tshut-polarity : The hardware-controlled active polarity 0:LOW + 1:HIGH. + +Exiample: +tsadc: tsadc@ff280000 { + compatible = "rockchip,rk3288-tsadc"; + reg = <0xff280000 0x100>; + interrupts = ; + clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>; + clock-names = "tsadc", "apb_pclk"; + resets = <&cru SRST_TSADC>; + reset-names = "tsadc-apb"; + pinctrl-names = "default"; + pinctrl-0 = <&otp_out>; + #thermal-sensor-cells = <1>; + rockchip,hw-tshut-temp = <95000>; + rockchip,hw-tshut-mode = <0>; + rockchip,hw-tshut-polarity = <0>; +}; + +Example: referring to thermal sensors: +thermal-zones { + cpu_thermal: cpu_thermal { + polling-delay-passive = <1000>; /* milliseconds */ + polling-delay = <5000>; /* milliseconds */ + + /* sensor ID */ + thermal-sensors = <&tsadc 1>; + + trips { + cpu_alert0: cpu_alert { + temperature = <70000>; /* millicelsius */ + hysteresis = <2000>; /* millicelsius */ + type = "passive"; + }; + cpu_crit: cpu_crit { + temperature = <90000>; /* millicelsius */ + hysteresis = <2000>; /* millicelsius */ + type = "critical"; + }; + }; + + cooling-maps { + map0 { + trip = <&cpu_alert0>; + cooling-device = + <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; + }; + }; + }; +}; -- cgit v1.1